/* style.css */

:root {
    /* Monochromatic Color Scheme with Biomorphic influence */
    --color-background: #F4F6F8; /* Soft, very light grey - biomorphic base */
    --color-surface: #FFFFFF; /* Pure white for cards, modals */
    --color-surface-alt: #E9EDF0; /* Slightly darker surface for depth */
    --color-text-primary: #222831; /* Dark, strong charcoal for main text */
    --color-text-secondary: #4A5568; /* Softer grey for secondary text */
    --color-border: #D1D9E0; /* Light, subtle border */
    --color-primary-accent: #007BFF; /* A vibrant blue as a single accent for interactable elements */
    --color-primary-accent-darker: #0056b3; /* Darker accent for hover/active states */
    --color-hero-text: #FFFFFF;
    --color-success: #28a745;
    --color-error: #dc3545;

    /* Fonts */
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Nunito', sans-serif;

    /* Spacing & Sizing */
    --spacing-unit: 8px;
    --container-width: 1140px;
    --container-padding: calc(var(--spacing-unit) * 2); /* 16px */
    --header-height: 80px;
    --header-height-mobile: 60px;

    /* Transitions & Animations */
    --transition-speed-fast: 0.2s;
    --transition-speed-normal: 0.3s;
    --transition-timing: ease-in-out;

    /* Shadows for depth - biomorphic softness */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);

    /* Border Radius for biomorphic curves */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
}

/* Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 100%; /* Corresponds to 16px by default */
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    margin-top: 0;
    margin-bottom: calc(var(--spacing-unit) * 2); /* 16px */
    line-height: 1.2;
    font-weight: 500;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.05); /* Subtle shadow for headings */
}

h1 { font-size: 2.8rem; } /* Approx 44.8px */
h2 { font-size: 2.2rem; } /* Approx 35.2px */
h3 { font-size: 1.6rem; } /* Approx 25.6px */
h4 { font-size: 1.2rem; } /* Approx 19.2px */

p {
    margin-bottom: calc(var(--spacing-unit) * 2); /* 16px */
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary-accent);
    text-decoration: none;
    transition: color var(--transition-speed-fast) var(--transition-timing);
}

a:hover {
    color: var(--color-primary-accent-darker);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

/* Layout Container */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* Section Styling */
.section-padding {
    padding-top: calc(var(--spacing-unit) * 8); /* 64px */
    padding-bottom: calc(var(--spacing-unit) * 8);
}

.section-padding-alt {
    padding-top: calc(var(--spacing-unit) * 8);
    padding-bottom: calc(var(--spacing-unit) * 8);
    background-color: var(--color-surface-alt);
}

.section-title {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 5); /* 40px */
    color: var(--color-text-primary);
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: calc(var(--spacing-unit) * 5); /* 40px */
    color: var(--color-text-secondary);
}

/* Text alignment utility */
.text-center {
    text-align: center;
}

/* Header */
.site-header {
    background-color: var(--color-surface);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    height: var(--header-height);
    transition: height var(--transition-speed-normal) var(--transition-timing);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
}
.logo:hover {
    color: var(--color-primary-accent);
    text-decoration: none;
}

.main-nav .nav-links {
    display: flex;
    align-items: center;
}

.main-nav .nav-links li {
    margin-left: calc(var(--spacing-unit) * 3); /* 24px */
}

.main-nav .nav-links a {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-speed-fast) var(--transition-timing), color var(--transition-speed-fast) var(--transition-timing);
}

.main-nav .nav-links a:hover,
.main-nav .nav-links a.active { /* Add .active class via JS for current page/section */
    color: var(--color-primary-accent);
    background-color: rgba(0, 123, 255, 0.05); /* Subtle highlight for accent color */
}

.nav-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-unit);
    z-index: 1001; /* Above nav links when mobile menu is open */
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-text-primary);
    position: relative;
    transition: transform var(--transition-speed-normal) var(--transition-timing);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--color-text-primary);
    transition: transform var(--transition-speed-normal) var(--transition-timing), top var(--transition-speed-normal) var(--transition-timing);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Mobile Nav Open State */
.nav-toggle[aria-expanded="true"] .hamburger {
    transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(90deg);
}
.nav-toggle[aria-expanded="true"] .hamburger::after {
    top: 0;
    transform: rotate(90deg);
    opacity: 0; /* Or rotate to form X if preferred */
}


/* Main content padding to avoid overlap with fixed header */
main {
    padding-top: var(--header-height);
}


/* Hero Section */
.hero-section {
    min-height: calc(100vh - var(--header-height)); /* Adjusted for header */
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    color: var(--color-hero-text);
    /* Gradient overlay is applied inline via style attribute in HTML */
}

.hero-content {
    position: relative; /* For z-index if needed */
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem; /* Larger for hero */
    font-weight: 700;
    color: var(--color-hero-text); /* Ensured white color */
    margin-bottom: calc(var(--spacing-unit) * 2.5);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.6); /* Enhanced shadow for readability */
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--color-hero-text); /* Ensured white color */
    margin-bottom: calc(var(--spacing-unit) * 4);
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
    text-shadow: 1px 1px 6px rgba(0, 0, 0, 0.5); /* Enhanced shadow for readability */
}


/* Global Button Styles */
.button, button, input[type="submit"], input[type="button"] {
    display: inline-block;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3.5); /* 12px 28px */
    border-radius: var(--border-radius-md); /* Biomorphic curve */
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: all var(--transition-speed-normal) var(--transition-timing);
    box-shadow: var(--shadow-sm);
    transform-origin: center;
}

.button-primary {
    background-color: var(--color-primary-accent);
    color: var(--color-surface);
    border-color: var(--color-primary-accent);
}

.button-primary:hover {
    background-color: var(--color-primary-accent-darker);
    border-color: var(--color-primary-accent-darker);
    color: var(--color-surface);
    transform: translateY(-2px) scale(1.02); /* Subtle lift and scale */
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.button-primary:active {
    transform: translateY(0px) scale(0.98);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.hero-button {
    font-size: 1.1rem;
    padding: calc(var(--spacing-unit) * 1.8) calc(var(--spacing-unit) * 4.5); /* Larger hero button */
}

/* Cards (Global) */
.card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-lg); /* More pronounced biomorphic curve */
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: transform var(--transition-speed-normal) var(--transition-timing), box-shadow var(--transition-speed-normal) var(--transition-timing);
    display: flex; /* For STROGO rule */
    flex-direction: column; /* For STROGO rule */
    align-items: center; /* For STROGO rule */
    text-align: center; /* For STROGO rule - content inside too */
    height: 100%; /* Make cards in a grid equal height */
}

.card:hover {
    transform: translateY(-5px) scale(1.01);
    box-shadow: var(--shadow-lg);
}

.card-image {
    width: 100%;
    /* Fixed height for image containers in cards for consistency */
    height: 200px; /* Adjust as needed */
    overflow: hidden;
    display: flex; /* Centers image if it's smaller */
    align-items: center;
    justify-content: center;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* STROGO rule */
    display: block; /* Remove extra space below image */
}

.card-content {
    padding: calc(var(--spacing-unit) * 3); /* 24px */
    flex-grow: 1; /* Allows content to fill space if card heights are equalized by grid/flex parent */
    display: flex;
    flex-direction: column;
    justify-content: space-between; /* Pushes button to bottom if present */
}

.card-content h3 {
    margin-bottom: var(--spacing-unit);
    font-size: 1.4rem;
}

.card-content p {
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.card-content .button { /* Button specific to card content area */
    margin-top: auto; /* Pushes button to the bottom */
    align-self: center; /* Center button if text isn't centered */
}


/* Projects Section - Carousel (basic structure, JS needed for full functionality) */
.content-carousel {
    display: flex;
    overflow-x: auto; /* Basic scroll, ideally use JS for proper carousel */
    gap: calc(var(--spacing-unit) * 3); /* 24px */
    padding-bottom: calc(var(--spacing-unit) * 2); /* Space for scrollbar */
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on touch devices */
}

.project-card {
    min-width: 300px; /* Min width for carousel items */
    flex: 0 0 auto; /* Prevent shrinking/growing */
}


/* Research Section - Accordion */
.accordion-container {
    max-width: 750px;
    margin: 0 auto;
}

.accordion-item {
    background-color: var(--color-surface);
    margin-bottom: var(--spacing-unit);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    overflow: hidden; /* For smooth animation */
}

.accordion-header {
    background-color: transparent; /* Button takes color from item */
    color: var(--color-text-primary);
    border: none;
    width: 100%;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 2.5);
    text-align: left;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition-speed-fast) var(--transition-timing);
}

.accordion-header:hover {
    background-color: rgba(0, 123, 255, 0.03); /* Very subtle hover */
}

.accordion-icon {
    font-size: 1.5rem;
    font-weight: 700;
    transition: transform var(--transition-speed-normal) var(--transition-timing);
    color: var(--color-primary-accent);
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed-normal) var(--transition-timing), padding var(--transition-speed-normal) var(--transition-timing);
}

.accordion-content p {
    padding: 0 calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 2.5);
    margin-bottom: 0;
    font-size: 0.95rem;
}

.accordion-item.active .accordion-content {
    /* max-height will be set by JS, e.g., scrollHeight */
    /* padding added for visible content */
}


/* Insights Section */
.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 3.5); /* 28px */
}


/* External Resources Section */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: calc(var(--spacing-unit) * 3); /* 24px */
}

.resource-card {
    background-color: var(--color-surface);
    padding: calc(var(--spacing-unit) * 2.5);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-speed-normal) var(--transition-timing);
    text-align: left; /* Override general card text-align if needed */
}
.resource-card:hover {
    box-shadow: var(--shadow-md);
}

.resource-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-unit);
}
.resource-card h4 a {
    color: var(--color-text-primary);
}
.resource-card h4 a:hover {
    color: var(--color-primary-accent);
}

.resource-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}


/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 3.5); /* 28px */
    align-items: stretch; /* Make cards in a row same height */
}

.pricing-card .card-content strong {
    font-size: 1.8rem;
    color: var(--color-primary-accent);
    display: block;
    margin-bottom: var(--spacing-unit);
}


/* Contact Section */
.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--color-surface);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 2.5); /* 20px */
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-unit);
    color: var(--color-text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5); /* 12px */
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md); /* Biomorphic curve */
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text-primary);
    background-color: var(--color-background); /* Slight contrast from form surface */
    transition: border-color var(--transition-speed-fast) var(--transition-timing), box-shadow var(--transition-speed-fast) var(--transition-timing);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-accent);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15); /* Focus ring */
    background-color: var(--color-surface);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.contact-form .button-primary {
    width: 100%;
    padding-top: calc(var(--spacing-unit) * 1.8);
    padding-bottom: calc(var(--spacing-unit) * 1.8);
    font-size: 1.1rem;
}


/* Footer */
.site-footer {
    background-color: var(--color-text-primary); /* Dark footer for contrast */
    color: rgba(255, 255, 255, 0.7); /* Light text on dark background */
    padding-top: calc(var(--spacing-unit) * 6);
    padding-bottom: calc(var(--spacing-unit) * 3);
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 4); /* 32px */
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.site-footer h4 {
    font-family: var(--font-heading);
    color: var(--color-surface);
    font-size: 1.3rem;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.site-footer p,
.site-footer li {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-unit);
}

.site-footer a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    transition: color var(--transition-speed-fast) var(--transition-timing);
}

.site-footer a:hover {
    color: var(--color-surface); /* Brighter white on hover */
    text-decoration: underline;
}

.footer-social .social-links li {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}
/* No specific icons, text links only as per requirement */

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: calc(var(--spacing-unit) * 3);
    text-align: center;
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}


/* Specific Page Styles */
/* success.html */
.success-page-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--header-height)); /* Full viewport height minus header */
    text-align: center;
    padding: var(--container-padding);
}

.success-content {
    background-color: var(--color-surface);
    padding: calc(var(--spacing-unit) * 5);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
}
.success-content h1 {
    color: var(--color-success);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-unit);
}
.success-content p {
    font-size: 1.1rem;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

/* privacy.html & terms.html */
.static-page-content {
    padding-top: calc(var(--spacing-unit) * 5); /* Extra padding from header is in main */
    padding-bottom: calc(var(--spacing-unit) * 5);
    background-color: var(--color-surface); /* Give content a surface */
    min-height: calc(100vh - var(--header-height) - var(--footer-height, 200px)); /* Adjust footer height estimate */
}
.static-page-content .container {
    max-width: 800px; /* More readable line length for text-heavy pages */
}
.static-page-content h1 {
    margin-bottom: calc(var(--spacing-unit) * 3);
}
.static-page-content h2 {
    margin-top: calc(var(--spacing-unit) * 4);
    margin-bottom: var(--spacing-unit);
}


/* 'Read More' Link Style */
.read-more-link {
    font-weight: 700;
    color: var(--color-primary-accent);
    text-decoration: none;
    display: inline-block;
    position: relative;
    padding-right: 20px; /* Space for arrow */
}

.read-more-link::after {
    content: '→'; /* Or an SVG icon */
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    transition: right var(--transition-speed-fast) var(--transition-timing);
}

.read-more-link:hover {
    color: var(--color-primary-accent-darker);
    text-decoration: underline;
}

.read-more-link:hover::after {
    right: -5px; /* Slight movement on hover */
}


/* Responsive Design */
@media (max-width: 992px) {
    .hero-title { font-size: 2.8rem; }
    .hero-subtitle { font-size: 1.15rem; }

    .insights-grid, .pricing-grid, .resources-grid, .footer-container {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: calc(var(--spacing-unit) * 2.5);
    }
}

@media (max-width: 768px) {
    body { font-size: 0.95rem; }
    h1 { font-size: 2.4rem; }
    h2 { font-size: 1.9rem; }
    h3 { font-size: 1.4rem; }

    .site-header {
        height: var(--header-height-mobile);
    }
    main {
        padding-top: var(--header-height-mobile);
    }

    .nav-toggle {
        display: block; /* Show burger menu */
    }

    .main-nav .nav-links {
        display: none; /* Hide default nav links */
        flex-direction: column;
        position: absolute;
        top: var(--header-height-mobile); /* Position below header */
        left: 0;
        width: 100%;
        background-color: var(--color-surface);
        box-shadow: var(--shadow-md);
        padding: var(--spacing-unit) 0;
        border-top: 1px solid var(--color-border);
    }

    .main-nav .nav-links.nav-active { /* Class added by JS to show menu */
        display: flex;
    }

    .main-nav .nav-links li {
        margin-left: 0;
        width: 100%;
        text-align: center;
    }

    .main-nav .nav-links a {
        display: block;
        padding: calc(var(--spacing-unit) * 1.8) var(--container-padding); /* 14.4px */
        width: 100%;
        border-radius: 0;
    }
    .main-nav .nav-links a:hover {
        background-color: rgba(0, 123, 255, 0.05);
    }

    .hero-title { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1rem; }

    .section-padding, .section-padding-alt {
        padding-top: calc(var(--spacing-unit) * 6); /* 48px */
        padding-bottom: calc(var(--spacing-unit) * 6);
    }

    .contact-form {
        padding: calc(var(--spacing-unit) * 3);
    }
}

@media (max-width: 576px) {
    .hero-title { font-size: 1.8rem; }
    .hero-subtitle { font-size: 0.9rem; }

    .button, button, input[type="submit"], input[type="button"] {
        padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 2.5);
        font-size: 0.9rem;
    }
    .hero-button {
        font-size: 1rem;
        padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3.5);
    }

    .insights-grid, .pricing-grid, .resources-grid, .footer-container {
        grid-template-columns: 1fr; /* Stack on smallest screens */
        gap: calc(var(--spacing-unit) * 2);
    }
    .card-image {
        height: 180px; /* Adjust for smaller screens */
    }
}


/* AOS Animation Overrides (if needed for drawn effect) */
[data-aos="fade-up"] {
    transform: translateY(30px); /* Slightly more pronounced for "drawn" feel */
    opacity: 0;
    transition-property: transform, opacity;
}
[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
    opacity: 1;
}
/* You can define more custom AOS animations or tweaks here */

/* For cookie consent form, styles are inline in HTML to ensure they load fast and are self-contained */